comments mesures of step 3
After checking of the original response curves with those obtained(thanks again at giskard to give original pict), I notice 2 problems important.
1 --- the lack of being able of the UHF makes so that acoustic
energy, product by the addition of the two curves, is weakened... By restoring the capacity of the UHF one should obtain a more
horizontal response around 7-9k.
2--- the original driver with diaphram is not same impedance and probably the notch arround 2K is not present in newer diaphram...
2 Attachment(s)
electrical curve of modification circuit uhf 2405
Well, for complete this job I re-keep the mesure of the electrical driver with L-Pad placed at goos mic set-up...
the result is the curve of uhf is less flat, in particulary the 20k is higher, but overrall response appear more flat and normal....
(see pict)
n.b. the uhf is play more higher but at measurement has which go up in Hz, the frequencies are proportionally attenuated by the distance... and directivity. So you remark the 20K is more down than electrical value...
Anyway, in this it not perfect but it is play more correct... now I wait the another time for final placement....
I try to buy a mils spec resistances recommended by list parts of giskard... for improvement result... and after last this modification I go in beach and I put a ionized sand in network (yulk yuk yuk )
It is joke... I put the cover and fill dry sand of special quartkz sand...
anybody;
Do you feeling I hope to put little value resistance for help to flat impedance electrical ???
or this is just OK???
anybody have a experiment this problem with dc charge and uhf ???
thanks at all.
Jean.